--- title: New Malware Called MosaicLoader Is Being Delivered Via Ads description: New Malware Called MosaicLoader Is Being Delivered Via Ads --- [Securafy Knowledge Hub](https://blog.securafy.com) - [Topics](https://blog.securafy.com/#sf-cover) - [Tools](https://blog.securafy.com/#sf-tools) - [Books & Guides](https://blog.securafy.com/#sf-books) [Talk to Securafy](https://meetings.hubspot.com/securafy/strategy-call) [Topics](https://blog.securafy.com/#sf-cover) [Tools](https://blog.securafy.com/#sf-tools) [Books & Guides](https://blog.securafy.com/#sf-books) [Talk to Securafy](https://meetings.hubspot.com/securafy/strategy-call) [Knowledge Hub](https://blog.securafy.com) / IT Operations IT Operations # New Malware Called MosaicLoader Is Being Delivered Via Ads New Malware Called MosaicLoader Is Being Delivered Via Ads ![Randy Hall](https://blog.securafy.com/hubfs/Randy%20Hall%202.png) By Randy Hall Updated Nov 2025 2 min read Share [**](https://www.linkedin.com/sharing/share-offsite/?url=https://blog.securafy.com/2021/08/04/new-malware-called-mosaicloader-is-being-delivered-via-ads) [**](https://twitter.com/intent/tweet?url=https://blog.securafy.com/2021/08/04/new-malware-called-mosaicloader-is-being-delivered-via-ads&text=%3Cspan+id%3D%22hs_cos_wrapper_name%22+class%3D%22hs_cos_wrapper+hs_cos_wrapper_meta_field+hs_cos_wrapper_type_text%22+style%3D%22%22+data-hs-cos-general-type%3D%22meta_field%22+data-hs-cos-type%3D%22text%22+%3ENew+Malware+Called+MosaicLoader+Is+Being+Delivered+Via+Ads%3C%2Fspan%3E) [**](mailto:?subject=%3Cspan+id%3D%22hs_cos_wrapper_name%22+class%3D%22hs_cos_wrapper+hs_cos_wrapper_meta_field+hs_cos_wrapper_type_text%22+style%3D%22%22+data-hs-cos-general-type%3D%22meta_field%22+data-hs-cos-type%3D%22text%22+%3ENew+Malware+Called+MosaicLoader+Is+Being+Delivered+Via+Ads%3C%2Fspan%3E&body=https://blog.securafy.com/2021/08/04/new-malware-called-mosaicloader-is-being-delivered-via-ads) ![](https://static.hsstatic.net/BlogImporterAssetsUI/ex/missing-image.png)Security company BitDefender has recently discovered a new strain of malware you should be aware of. They have dubbed the new threat MosaicLoader. According to the company it is currently being distributed via ads displayed in search results when an internet user searches for links to cracked versions of popular software. It is designed to steal passwords, deliver other forms of malware, and install cryptocurrency miners. This means that if it winds up on your system it can cause all manner of problems for you. Most malware we see today is delivered via phishing attacks or by exploiting unpatched software. MosaicLoader's method of delivery makes it markedly different and thus noteworthy. **Bogdan Botezatu of BitDefender had this to say about the recent discovery:** *"Most likely, attackers are purchasing adverts with downstream ad networks - small ad networks that funnel ad traffic to larger and larger providers. They usually do this over the weekend when manual ad vetting is impacted by the limited staff on call."* Most up to date antivirus software would spot and prevent the installation of MosaicLoader. Unfortunately many people who are looking for cracked versions of popular software turn their antivirus software off. Hackers around the world are well aware of this and are seeking to take advantage. **Bogdan Botezatu continues:** "*From what we can tell, this new MosaicLoader attempts to infect as many devices as possible, likely to build up market share and then sell access to infected computers to other threat actors. We advise users to never turn off their security solution when it blocks the installation of software downloaded from the internet, as attackers have become adept at bundling legitimate apps with malware."* It's good advice. Make sure all of your employees are aware and on their guard. That's not a perfect solution but it is a very good start. Tagged Under IT Operations[Cybersecurity](https://blog.securafy.com/tag/cybersecurity)Business ContinuityAI Governance In This Article Need Help With Your Current Setup? Talk through your current systems, risks, and support gaps with Securafy. [Book a Strategy Call](https://meetings.hubspot.com/securafy/strategy-call) ## Join The Conversation Have a question or perspective on this topic? Add it below. ![Randy Hall](https://blog.securafy.com/hubfs/Randy%20Hall%202.png) About The Author Randy Hall · CEO & Founder Randy Hall is the CEO and Founder of Securafy, with decades of experience helping organizations make smarter, safer decisions about technology. A frequent speaker and instructor at national IT events, Randy has advised thousands of organizations, from startups and SMBs to large enterprises and U.S. government entities, on secure, practical technology adoption. He writes about the decisions business leaders are often expected to make without enough context, including cybersecurity, compliance, AI, cyber insurance, IT strategy, and business resilience. Outside the office, you’ll often find Randy on Lake Erie enjoying time on his 38-foot Chris-Craft. **Writes about:** Cybersecurity strategy, compliance, AI security, business resilience, cyber insurance, SMB risk, IT leadership [More From This Author →](https://blog.securafy.com/author/randyhall) Related Articles Business Continuity [Compliance Risk Assessment: How Downtime Impacts Your Bottom Line](https://blog.securafy.com/compliance-risk-assessment-how-downtime-impacts-your-bottom-line) When systems go down, compliance obligations don't pause—and the financial consequences ... 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